Tube frame for axminster looms



June 3, 1930. w. w. ROBERTSON TUBE FRAME FOR AXMINSTER LOOMS Fi led Feb.19, 1929 VIIIIIIIIA II Farmed w- 9 1,760,963

WILLIAM WQROBERTSDN, or wonossma MAssAoHUs rrs' ASSIGNOB 'r'o;orvoivrr'roir @KNOWLES LOOM WORKS, 015 WORCESTER MASSACHUSETTS, A"CoRroItA'rIoN or MASSACHUSETTS c, 1. r 1' i I TUBE FRAME 130R AXMINSTERLOOMS A pplica tion filed Fa e ia-" eaeq Serial in. 341,118. V p

1 This invention relatesto improvements in" :place under strain thatportion of thespring I tube frames for Axmin'ster looms and it isthewhich engages {the retaining. pin, said progeneral object of theinvention to provide. an jecting portion cooperating with-the stoplimproved means for retaming a cham engag- I motion and also be ngengageab'le by an apbe readily removed when repair is needed butwardly'with respect to the tube frame so as will ordinarily be heldsecurely-in position. to release the retaining pin.

V The usualAxminster loom employs a'pair f. It is; a more particularobject of my in of transporting chains between whi ch are ventiontoprovide a tube frame with a bracket 10 suspended tube frames carryingthe'variously having an opening th'ereinthrough whichq r colored tuftyarns which form'gthe surface may eX-tenda deformedpart of a; springlatch, v ofthe Axminster fabric.- The tube frames said deformed part*cooperating witha reare'held by releasable connections to thetainingpinin such a way as. to prevent endchain and theseconnections'are engagefdby wise movement of the'latter ther'ebyholdingmay be moved from the chain'to tuft f0rmtube frame and bracket. It issufficient for ing position near the fabric; It isdesirable .thepurposes "offmypresent invention ifthe that the connectioiiibetween thetube-frame retaining pin, spring andbracket areso reand the chains be.durable and alsoquickly lated thatit isnecessary. to move a portion 1 2replaceable in case of breakage. Ithasbeen of the spring relativelytothe bracket in orcustomary heretofore to employ in tube der to-provideclearance. for-the removalof frames both of the'narrow and wide type athe pin. :Thisfresul't'may beaccomplished in pair of spring members heldto the brackets the dilferentway set forth hereinafter but on the endsof thetube frames by means of I do notwish: to be limitedtotheseparticular been replaced several times the. screws are .Withthese and other-objects in viewwhich not strong enough to be held verytightly-to will. appear as the description proceeds, my 2 the bracketand it is an object-of my present invention resides in the combinationand-arinvention to eliminate theuse-of screws or rangementof partshereinafter described and similar connections between the springs andset forth in the claims. V

the fl this T651111? being mpl e In theaccompanying drawings wherein a ply'by y ng 1 1 the inherent'reconvenient embodiment of my inventionissilience of the spring or springs to hold are- Set f th, f V I p v {Atammg pm m Fig. lis afront'elevationofone end ofa a I In s l a 100m if'i a tube frame formedaccording to my inven-- .Stop motlon'whlchoperates'to'stop t 00m tion the preferred form ofthe invention be- 1 1fthe tube frame fails to be released from arts bein vin Section and therethe transporting chains. =This motion vusualh j 1 th 1y cooperates witha projecting portion of 325 2 9m V917 s 9 F Q P'. 4n. I", the tubeframe. It 1s afurther ob ect of my I g 2 is an end elevation lookingiinrthe I present invention to provide the latch springs withga lower'bentportion. which extends f l. f W garound a retaining pin to hold thelatter in F g-. 5 an arg flem h011Z0I1ta1 position, the lower portion ofthe spring prosectlon on line 3-3 of F1g. 1, 1 Y

jecting outwardly from the tube frame to Fig.4 isa view similarto aportion ofFig. 90

ing spring hook or latchso that the same may propriately formed: tool tobe pressed in-QEO clutches so that the tube frames one at a time; said'pinin fixed position with respect to thefl i screws. I find that afterthe springs have forms of pins or engaging portions therefor i 1 butwith a modified form of retaining pin, and i Fig. 5 is a detailedhorizontal section on line 55 of Fig. 4.

Referring particularly to Fig. 1, I have shown a tube frame 10 which maybe of tubular metallic stock formed substantially rectangular in crosssection. A bracket or head 11 has a spool bearing portion 12 to receivethe gudgeon of a spool S and said bracket may also be provided with achain engaging member 13 having an offset tongue 14:to eX- tend betweenthe links 15 of a transporting chain. The members 11 and 13 are providedwith parallel spaced arms 16 and 17, respectively, which are insertedinto the tubular bar 10 and held in position by screws 18.

A clutch C is mounted on a stud 19 which is supported by and movablewith a transferrer arm not shown. Said clutch is movable angularly aboutthe axis of the stud when the tube frame is adjacent the cloth to effectproper entry of the tuft yarns between the warp threads .of the fabric.The upper portion of the clutch is provided with a releasing screw 20which engages a portion of the spring latch 21. A plunger having a head22 is also slidably mounted in the clutch and is part of the previouslymentioned loom stopping mechanism. The upper end of the spring latch 21is formed with a hook 23 as shown in Fig. -1"to lieover and have tubeframe supporting engagement with one of he links 15 of the transportingchain.

The matter thus far described is of com mon construction and of itselfforms no part of my present invention. It is to be understood that thetransporting chain is given successive movements so that the tubeframes, several of which are employed in the loom, will be presentedsuccessively to tuft forming position. The movement of the chain isintermittent and while it is at rest t 1e clutches will move inwardly toengage the spring hook to move the latter to the dotted line positionshown in Fig. 1, after which the clutch is moved downwardly, the tubeframe moving with the clutch because of the fact that the hook 23 is outof holding position with respect to the transporting chain.

My invention relates more particularly to the manner for retaining thespring latch in position on the tube frame. As shown in Figs; 1, 2'and?) I have provided the member 13 with a vertical slot '30. The lowerend of the spring is. formed with a V-shaped bend 31 :havingthe vertexthereof extending into the tube'frame. The lower portion of the springnormally projects as at to the rightof the member 13 as shown in. 1.'The preferred form of the pin as shown in Figs. 1,2 and 3 is indicatedat 40 and is shown more particularly in Fig. 3-, where it will be notedthat the intermediate portion of said pin a1 "is reduced, 'th'u'sdefining heads 42'at't'he ends of the pin. The vertex of the V-shapedbend in the spring is received between the heads and the two sides ofthe bend are normally under strain or stressed so as to hold said pinagainst the upright portion of the member 13. In this way the pin isheld against longitudinal displacement by reason of the fact that thespring is restrained against transverse movement with respect to thetube frame by the walls of the sl0t'30.

The slot is sufliciently large to permit unobstructed insertion of theV-shaped portion of the spring, but after said portion and the pin areplaced as shown in Fig. 1 they will be held substantially rigid withrespect to the tube frame.

In the modified form of pin shown in Figs. 4 and 5 I provide a pin withan offset portion 51 proportioned to enter the slot 30. The innerportion of the pin as shown at the left hand side thereof in Fig. 5 hasa recess 52 to receive the spring, the pin in effect being formed by asingle punching and cutting-off operation. In the modified form it willbe seenthat the pin is held against longitudinal movement by engagementwith the sides of the slot 30 and also by reason of the fact that thespring which enters the slot 52 is held substantially in position by'theside walls of the slot30.

In operation that portion of the spring which lies within the tube frameeither'is substantially rigid, the pin serving to retain the spring-inposition and being held as shown in Fig. 1 by the resilience of theV-shaped portion of the spring. When it is desired to replace a springan appropriate tool'T, as shown in dot and dash lines in Fig. 4, bemovedagainst the projecting end 32 of the spring to move said end inwardlytoward the tube frame. This action will result in a deformation of theV-shaped portion 31 until the same assumes some such a form as indicatedin dotted lines in Fig. 4, after which the pin may be moved endwise topass out of one or another of the notches 53 formed in the oppositevertical walls of the tube frame 10 as shown clearly in'Fig. 1.

After a new spring is inserted and held deformed as indicated in Fig. Lthe same pin or a freshpin may be put in position, after which the toolT may be removed and the resilience of the spring will move the pinagainst the bracket due to'the factthat the portions of the spring whichengage the upper and lower ends of the slot are inclined.

With respect to the modified form of the invention, particularly asshown in Fig. 5, it will be seen that the amount by which the V-shap'edportion of the spring must be moved into the tube frame before the pinof the modified form can be removed is substantially twice the offset,due to the fact that said offset enters the recess 52 on the side of thepi'n'opposite the slot 30. For this reason metres the modified form ofpin is subject 'to less accidental displacement than is the case withoperate with the slot-Vin the bracket to hold the pinagainst' saidbracket. Also, the

spring latch may be removed, or replaced without disturbingthe bracket11. It will also be seen more specificallythat the pin and spring haveinterengaging portions which prevent longitudinal displacement of thepin due to the fact that the spring is held against displacement by theslot Having thus described my invention it will be seen that changes andmodifications may be madevtherein by those skilled in the art withoutdeparting from the spirit and scope of the invention and I do not wishto be limited to'the detailsherein disclosed, but what I claim is:

1. In an Axminster tubeframe having a longitudinal bar, a bracketsecured to the bar and having an opening therethrough, airinherentlyresilient spring latch extending through the opening and engaging thebracket on opposite sides of the opening, and latch retaining means heldagainst the bracket by the resilience of that portion of 'the lspringlatch which passes through the opening.

2. In an Axininster tube frame having ainclined sides and the bracketand held ainst the latter by the resilience of said inclined sldes. e

3. In an Axminister tube frame havinga longitudinal bar, a bracketsecured to the bar and having an opening therethrough, an inherentlyresilient spring latch entering-the opening at one side thereof andbeing bent to leave the opening at the opposite side thereof, saidspring latch engaging the bracket on opposite sides of the opening, anda retaining member located between a bracket I and the bent portion ofthe spring latch and held by the resilience of the latter against thebracket.

4-. In an Axminster tube framehaving a longitudinal bar, a bracketsecured to the bar and having an opening therethrough, an in herentlyresilient spring latch having a portion formed with a surface inclinedwith respect to the bracket, said portion with the ining, and a latchretainer held against the clined fsu'rface extending through the open- 1bracket by the resilience of that portion of the latch which passesthrough the opening.

Y 5, In an'Axminster tubeframe having a longitudinal bar, a bracketsecured to the bar and having an opening therethrough, an

inherently resilient spring latch the lower portion of'w'hich passesthrough the slot and engages tha-tportion-of the bracket adJaCent theupper'end of the slot, the portion of the spring latch which enters theslot being bent;

and extending out of the slot'and in contact with that'portion of thebra'cketadj acent the lower end of the slot, and retaining meansinterposed between the bent portion of the spring latch and that sideof'the'bracket opposite the side of the slot which the spring latchenters, the inherent resilience of the spring latchholding the deviceagainst the bracket. f 1

6. In anAxininstertube frame having a longitudinal bar, a bracketsecured to thebar and havin an opening therethrough, 'a spring latchthelower' end of which isinherently' resilient andextends into the open-7 ing, a retaining pin held bythe inherent re-j 7. In a tube frame foranAxminster loom,

a longitudinal bar, a bracket member secured to, the bar having anopening 'therethrough, the latch member having a resilientportion whichextends through the opening, and a retaining element held by theresilienceof the latchmemberragainst the bracket' mem ber-,,saidretaining'element having a shoulder to engage one of the membersandbeingjheld thereby, against longitudinal movement.

8. In an Axminister] tube frame, a' bar, ay 1 bracket secured to "thebar and having an of which is resilient and extends' into theopening toengage the bracketon' onesideiof said-opening and is bent and extendsout of the opening to engage the bracket on theop I posite side of theopening, thelatter portion projecting beyond the outer surface ofthe 7bracket to be inI-p'osition-to be engaged and:

moved toward the'bracket to" cause deformation ofthatportion of thelatch which extends through the opening, and a-retaining elementengagedand-held against the bracket-by the inherently resilient portionof the latch which extends through the opening v .9. In an Axminstertube frame, a bar, a

bracket secured to the bar and having an a no openingtherethrough, alatch the'lower end I part of the bracket adjacent the upper end of'theslot and extending through the latter and being bent to project out ofthe slot on the same side of the bracket as the side from which thelatch enters the slot, the portions of the brackets defining the sidesof the slots acting to prevent substantial sidewise movement of thelatch, and a pin held against the bracket by the inherent resilience ofthe bent portion of the latch which extends through the slot.

10. In an Axminster tube frame, a bar, a bracket secured to the bar andhaving an opening therethrough, a latch the lower end of which isresilient and extends through and is substantially as wide as the slot,the re-- silient portion of the latch engaging that part of the bracketadjacent the upper end of the slot and extending through the latter andbeing bent to project out of the slot on the same side of the bracket asthe side from which the latch enters the slot, the portions of thebrackets defining the sides of the slots acting to prevent substantialsidewise movement of the latch, and a pin held against the bracket bythe inherent resilience of the bent portion of the latch which extendsthrough the slot, the pin'having a shoulder to be engaged by the latchwhereby longitudinal movement of the pin is resisted.

11. In an Axminster tube frame, a longitudinal bar, a bracket membersecured to the bar and having an opening therethrough, a latch memberthe lower portion of which is resilient and extends from the outer sideof the bracket through the opening and is bent and then returns throughthe opening to project beyond the outer side of the bracket, the latchmember being substantially the same width as the width of the slot, anda retaining element having a shoulder to engage one of the members to beheld by the latter against longitudinal movement.

12. In an Axminster tube frame, a longitudinal bar, a bracketmembersecured to the bar and having an opening therethrough, a latch memberthe lower portion of which is resilient and extends from the outer-sideof the bracket through the opening and is bent and then returns throughthe opening to project beyond thev outer side of the bracket,-

the latch member being substantially the same width as the width of theslot, and a retaining element having a shoulder to engage the latchmember to be held by thelatter against longitudinal movement, said latchmember acting by the inherent resilience thereof to hold the pin againstthe bracket.

13. In an Axminster tube frame, a bar, a bracket secured to the bar andhaving an opening therethrough, a latch member the lower portion ofwhich is resilient and extends into the opening in the bracket and isbent to project back through the opening, the lower portion of the latchhaving engage-

